this post was submitted on 06 Sep 2025
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xkcd #3138: Dimensional Lumber Tape Measure

Title text:

A person with two watches is never sure what time it is, especially if I got them one of the watches.

Transcript:

Transcript will show once it’s been added to explainxkcd.com

Source: https://xkcd.com/3138/

explainxkcd for #3138

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[–] celeste@kbin.earth 15 points 2 days ago (1 children)

The thought of reaching into my toolbox and pulling out a measuring tape that's labeled wrong without knowing it. He did a good job with this comic. That thought sucks so bad.

[–] captain_aggravated@sh.itjust.works 5 points 2 days ago (2 children)

My sawyer showed me a measuring tape graduated in tenths of a foot. Someone manufactured that for some reason.

[–] lunarul@lemmy.world 3 points 2 days ago

As a European, it took me a while to realize what's wrong with that. Even though I've been living in the US for almost 14 years now.

[–] stelelor@lemmy.ca 1 points 2 days ago* (last edited 2 days ago) (1 children)

Oh yeah, we use these "decimal feet" rulers at my job, for surveying. Nobody bothered to tell me ahead of time, so my first few days out in the field were pretty much a complete waste. I still maintain they are an abomination, the worst of both systems.

[–] lunarul@lemmy.world 2 points 2 days ago* (last edited 2 days ago)

If it's used for surveying, aren't those survey feet? (a survey foot is 1.000002 US customary feet). Dividing a survey foot by 12 would not be technically an inch, even though it's only a couple millionths off.